Year 8 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 decimals worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · DecimalsYear 8 Adding and Subtracting Decimals Worksheet — Level 3 — Practice Set 3 — Answers
Line up the decimal points before you add or subtract.
1.
210.41
+35.83
Answer: 246.24
- Line up the decimal points
- 210.41 + 35.83 = 246.24
2.
76.77
+19.97
Answer: 96.74
- Line up the decimal points
- 76.77 + 19.97 = 96.74
3.
60.00
−25.93
Answer: 34.07
- Line up the decimal points
- 60.00 − 25.93 = 34.07
4.
131.07
−5.78
Answer: 125.29
- Line up the decimal points
- 131.07 − 5.78 = 125.29
5.
81.16
−25.02
Answer: 56.14
- Line up the decimal points
- 81.16 − 25.02 = 56.14
6.
364.28
−200.02
Answer: 164.26
- Line up the decimal points
- 364.28 − 200.02 = 164.26
7.
82.94
+159.23
Answer: 242.17
- Line up the decimal points
- 82.94 + 159.23 = 242.17
8.
23.21
+12.38
Answer: 35.59
- Line up the decimal points
- 23.21 + 12.38 = 35.59
9.
294.79
+118.82
Answer: 413.61
- Line up the decimal points
- 294.79 + 118.82 = 413.61
10.
351.97
−168.78
Answer: 183.19
- Line up the decimal points
- 351.97 − 168.78 = 183.19
11.
340.89
+17.75
Answer: 358.64
- Line up the decimal points
- 340.89 + 17.75 = 358.64
12.
356.27
−119.67
Answer: 236.60
- Line up the decimal points
- 356.27 − 119.67 = 236.60
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.